The world was stunned when Olympian "Blade Runner" Oscar Pistorius was arrested in South Africa for the murder of his girlfriend, the beautiful reality show star and model 29-year-old Reeva Steenkamp. The double amputee, who overcame incredible odds to compete against able-bodied athletes at the Olympics, broke down in court and has reportedly maintained that his mistook his girlfriend for an intruder. She was found shot four times in the bathroom of the home the couple shared. But sources are leaking to South African newspapers some more alleged details from that night -- and they paint a picture of a horrific night and a brutal deliberate murder.

Sources are telling South African media outlets that the case will center around a bloody cricket bat found on the scene and that Reeva's skull was allegedly also bashed in.

Says a source:

The suspicion is that the first shot, in the bedroom, hit her in the hip. She then ran and locked herself in the toilet. She was doubled over because of the pain. He fired three more shots. She probably covered her head, which is why the bullet also went through her hand. The bedsheets also reportedly indicate that there were two people sleeping in it before the deadly shooting.

As for the cricket bat, reportedly sources say that Pistorius either hit her with the bat before she ran to the bathroom, or that she used the bat to defend herself, or that he used it to smash his way into the bathroom. None of these theories particularly make sense: If he smashed her skull before she ran to the bathroom, how did she make it there? Why did he shoot her if he'd already "smashed her skull"? If she used it for defense, why would her blood be on it?

At any rate, the sources say that the state has "rock solid proof" that it was a homicide, and that Pistorius knew he was killing Reeva, not an intruder. There have been reports that he suspected she was cheating on him. Also that he'll be tested for steriods and a possible "roid rage" defense set up.

I think with all high profile murder cases, there's going to be a lot of speculation about what happened, and most of that will have no basis in reality until the evidence comes out in court. However, how you mistake anyone in your own bathroom for being an intruder is a good question (wouldn't she have been crying out, letting you know it's your girlfriend not an intruder?!) -- and surely one that Pistorius will have to answer eventually.